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nvme/tcp: Calculate requests completed asyncronously

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A preparation step for enabling zero copy in NVMEoF TCP initiator.
With zero copy enabled, some requests might be completed out
of "process_completions" call and we should take them into
account to return the correct number of completions.

Change-Id: Iba7973f6da815645bbfad0334619d46b66379226
Signed-off-by: Alexey Marchuk <alexeymar@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/4209
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
This commit is contained in:
Alexey Marchuk 2020-09-01 11:53:46 +03:00 committed by Tomasz Zawadzki
parent 2ceff364e5
commit a910bc647d
1 changed files with 15 additions and 3 deletions
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18
lib/nvme/nvme_tcp.c
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@ -88,6 +88,7 @@ struct nvme_tcp_qpair {
struct nvme_tcp_req *tcp_reqs;
uint16_t num_entries;
uint16_t async_complete;
struct {
uint16_t host_hdgst_enable: 1;
@ -550,6 +551,10 @@ nvme_tcp_req_complete_safe(struct nvme_tcp_req *tcp_req)
SPDK_DEBUGLOG(SPDK_LOG_NVME, "complete tcp_req(%p) on tqpair=%p\n", tcp_req, tcp_req->tqpair);
if (!tcp_req->tqpair->qpair.in_completion_context) {
tcp_req->tqpair->async_complete++;
}
/* Cache arguments to be passed to nvme_complete_request since tcp_req can be zeroed when released */
memcpy(&cpl, &tcp_req->rsp, sizeof(cpl));
user_cb = tcp_req->req->cb_fn;
@ -1442,7 +1447,8 @@ nvme_tcp_read_pdu(struct nvme_tcp_qpair *tqpair, uint32_t *reaped)
}
pdu->ch_valid_bytes += rc;
if (pdu->ch_valid_bytes < sizeof(struct spdk_nvme_tcp_common_pdu_hdr)) {
return NVME_TCP_PDU_IN_PROGRESS;
rc = NVME_TCP_PDU_IN_PROGRESS;
goto out;
}
}
@ -1462,7 +1468,8 @@ nvme_tcp_read_pdu(struct nvme_tcp_qpair *tqpair, uint32_t *reaped)
pdu->psh_valid_bytes += rc;
if (pdu->psh_valid_bytes < pdu->psh_len) {
return NVME_TCP_PDU_IN_PROGRESS;
rc = NVME_TCP_PDU_IN_PROGRESS;
goto out;
}
/* All header(ch, psh, head digist) of this PDU has now been read from the socket. */
@ -1491,7 +1498,8 @@ nvme_tcp_read_pdu(struct nvme_tcp_qpair *tqpair, uint32_t *reaped)
pdu->readv_offset += rc;
if (pdu->readv_offset < data_len) {
return NVME_TCP_PDU_IN_PROGRESS;
rc = NVME_TCP_PDU_IN_PROGRESS;
goto out;
}
assert(pdu->readv_offset == data_len);
@ -1507,6 +1515,10 @@ nvme_tcp_read_pdu(struct nvme_tcp_qpair *tqpair, uint32_t *reaped)
}
} while (prev_state != tqpair->recv_state);
out:
*reaped += tqpair->async_complete;
tqpair->async_complete = 0;
return rc;
}